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MB1 User Manual
© 2016 Expert Electronics
REAR PANEL DESCRIPTION
18) REF IN - Input for an external reference frequency 10 MHz.
Connect to the REF IN an external reference oscillator with a 10 MHz frequency (more
details in Reference input) .
19) GPS - Antenna input of the internal GPS receiver.
Not used in the current MB1 transceiver.
20) PTT - Jack for PTT footswitch.
Connect a PTT footswitch to the jack, for control when in TX mode.
21) KEY - Jack for CW key.
Connect a CW key to the KEY jack.
The key can be a twin-paddle or a single-paddle key or a classic straight key (more details in
Accessories ).
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